A larger capacity battery will last longer.
We do not offer them for sale on our website, but you can purchase compatible batteries at a local hobby store, or online.
They are physically larger and won’t fit perfectly into the battery compartment but they will work with the machine.
Below are links to some examples - the battery linked to is not necessarily a recommendation, but just an example of what the larger capacity battery looks like. Please note: always purchase the charger that is recommended for the battery you choose.
Feel free to purchase any compatible battery/brand anywhere they are sold - just be sure you get an 11.1V 3s battery with an xt60 connector like the one in the link. The "mah" is capacity. The battery that comes with SwiftPaws home is 1500mah and lasts 10 minutes. The one in the link is 6,000mah (the bigger the number, the larger the capacity)